joker
noun
he had a reputation as the family joker:
humorist, comedian, comedienne, comic, funny man/woman, wag, wit, jester;
prankster, practical joker, hoaxer, trickster, clown;
informal card, jokester, wisecracker;
archaic quiz, droll, merry andrew;
rare quipster, gagster, jokesmith, punster, kidder, farceur.